Metallica’s Robert Trujillo and Kirk Hammett continue to surprise with their nightly "doodle" segment, evidenced last night (Apr 30), when the pair covered the 1983 Accept classic "Balls to the Wall" in Leipzig, Germany.

In the video clip, which can be seen above, Trujillo does a spot on impression of former Accept frontman Udo Dirkschneider, adopting a thick German accent.

While drummer Lars Ulrich and frontman James Hetfield have taken a break each night of the WorldWired Tour, Hammett and Trujillo have been making the most of their time in the spotlight following the playing of the song "Halo on Fire," taking the the opportunity to cover an artist from the European cities in which they are performing.

Next up for Metallica is a gig in Oslo, Norway at the Telenor Arena tomorrow night (May 2). Then it's a handful of additional European dates before taking off for the summer and returning to the road in North America for a run of arena shows. The full list of upcoming dates can be found here.